Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2007-11-06
2007-11-06
Kim, Paul D. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S610100, C029S611000, C219S209000, C360S122000, C360S125330, C360S317000, C360S324000, C360S320000, C427S127000, C427S128000
Reexamination Certificate
active
11231201
ABSTRACT:
A magnetic head including a media heating device. Following the fabrication of the heating device, a sacrificial layer of material is deposited to protect the heating device during subsequent process steps. Thereafter, write head components, such as write head induction coils and/or a P1pole pedestal are fabricated above the heating device, and the sacrificial layer is substantially consumed in protecting the heating device during the aggressive etching and milling steps used to create those components. Further components, including a second magnetic pole are thereafter fabricated to complete the fabrication of the write head portion of the magnetic head. The sacrificial layer may be comprised of alumina, or a material such as NiFe that can act as a seed layer for a subsequent head components such as the P1pole pedestal.
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“Data Recording at Ultra High Density”, IBM Technical Disclosure Bulletin, vol. 39, No. 07, Jul. 1996.
Fontana, Jr. Robert E.
Lille Jeffrey S.
Guillot Robert O.
Hitachi Global Storage Technologies - Netherlands B.V.
Intellectual Property Law Offices
Kim Paul D.
LandOfFree
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